Storage engines
InnoDB
Supports transactions, row-level locking, and foreign keys
[
Variabel
|
Penampungan Penyangga
|
Status InnoDB
]
=====================================
2026-04-01 19:28:54 0x7f8e540c2700 INNODB MONITOR OUTPUT
=====================================
Per second averages calculated from the last 55 seconds
-----------------
BACKGROUND THREAD
-----------------
srv_master_thread loops: 62 srv_active, 0 srv_shutdown, 723 srv_idle
srv_master_thread log flush and writes: 0
----------
SEMAPHORES
----------
OS WAIT ARRAY INFO: reservation count 207
OS WAIT ARRAY INFO: signal count 206
RW-shared spins 18, rounds 34, OS waits 16
RW-excl spins 15, rounds 394, OS waits 12
RW-sx spins 1, rounds 30, OS waits 1
Spin rounds per wait: 1.89 RW-shared, 26.27 RW-excl, 30.00 RW-sx
------------
TRANSACTIONS
------------
Trx id counter 10256
Purge done for trx's n:o < 10256 undo n:o < 0 state: running but idle
History list length 17
LIST OF TRANSACTIONS FOR EACH SESSION:
---TRANSACTION 421724291508840, not started
0 lock struct(s), heap size 1136, 0 row lock(s)
---TRANSACTION 421724291507968, not started
0 lock struct(s), heap size 1136, 0 row lock(s)
--------
FILE I/O
--------
I/O thread 0 state: waiting for completed aio requests (insert buffer thread)
I/O thread 1 state: waiting for completed aio requests (log thread)
I/O thread 2 state: waiting for completed aio requests (read thread)
I/O thread 3 state: waiting for completed aio requests (read thread)
I/O thread 4 state: waiting for completed aio requests (read thread)
I/O thread 5 state: waiting for completed aio requests (read thread)
I/O thread 6 state: waiting for completed aio requests (write thread)
I/O thread 7 state: waiting for completed aio requests (write thread)
I/O thread 8 state: waiting for completed aio requests (write thread)
I/O thread 9 state: waiting for completed aio requests (write thread)
Pending normal aio reads: [0, 0, 0, 0] , aio writes: [0, 0, 0, 0] ,
ibuf aio reads:, log i/o's:, sync i/o's:
Pending flushes (fsync) log: 0; buffer pool: 0
1502 OS file reads, 3063 OS file writes, 1199 OS fsyncs
0.18 reads/s, 13312 avg bytes/read, 12.27 writes/s, 4.58 fsyncs/s
-------------------------------------
INSERT BUFFER AND ADAPTIVE HASH INDEX
-------------------------------------
Ibuf: size 1, free list len 0, seg size 2, 0 merges
merged operations:
insert 0, delete mark 0, delete 0
discarded operations:
insert 0, delete mark 0, delete 0
Hash table size 34679, node heap has 2 buffer(s)
Hash table size 34679, node heap has 2 buffer(s)
Hash table size 34679, node heap has 8 buffer(s)
Hash table size 34679, node heap has 1 buffer(s)
Hash table size 34679, node heap has 25 buffer(s)
Hash table size 34679, node heap has 2 buffer(s)
Hash table size 34679, node heap has 4 buffer(s)
Hash table size 34679, node heap has 31 buffer(s)
1448.05 hash searches/s, 1159.89 non-hash searches/s
---
LOG
---
Log sequence number 51681545
Log buffer assigned up to 51681545
Log buffer completed up to 51681545
Log written up to 51681545
Log flushed up to 51681545
Added dirty pages up to 51681545
Pages flushed up to 51681545
Last checkpoint at 51681545
1103 log i/o's done, 6.05 log i/o's/second
----------------------
BUFFER POOL AND MEMORY
----------------------
Total large memory allocated 137363456
Dictionary memory allocated 1051202
Buffer pool size 8192
Free buffers 6479
Database pages 1638
Old database pages 585
Modified db pages 0
Pending reads 0
Pending writes: LRU 0, flush list 0, single page 0
Pages made young 610, not young 310066
0.00 youngs/s, 0.00 non-youngs/s
Pages read 1351, created 293, written 1680
0.00 reads/s, 0.00 creates/s, 0.00 writes/s
Buffer pool hit rate 1000 / 1000, young-making rate 0 / 1000 not 0 / 1000
Pages read ahead 0.00/s, evicted without access 0.00/s, Random read ahead 0.00/s
LRU len: 1638, unzip_LRU len: 0
I/O sum[296]:cur[0], unzip sum[0]:cur[0]
--------------
ROW OPERATIONS
--------------
0 queries inside InnoDB, 0 queries in queue
0 read views open inside InnoDB
Process ID=371, Main thread ID=140248806795008 , state=sleeping
Number of rows inserted 745, updated 1281, deleted 82, read 2177243
5.87 inserts/s, 10.95 updates/s, 0.00 deletes/s, 1872.44 reads/s
----------------------------
END OF INNODB MONITOR OUTPUT
============================
